Photos involve creativity. Photos that don't involve creativity aren't usually considered copyrightable by the courts (hence why all copyright cases I followed include arguments that establish why creativity was a material to creating the work).

Weights, on the other hand, are a product of a purely mechanical process. Sure, the process itself required creativity as did the composition of data, but the creation of the weights themselves do not.

Model weights are effectively public domain data according to the criteria outlined in statement issued by the US copyright office a year ago: https://www.federalregister.gov/documents/2023/03/16/2023-05...